Mahiro was suddenly dumped by the man she loved. Unable to accept the breakup, one day she used a spare key to break into her ex-boyfriend's house. While hiding in the closet and observing his daily life, she felt an intense wave of ecstasy rise up within her. Since then, Mahiro's actions have become more extreme. She mixed drugs into the liquid and unilaterally raped her sleeping ex-boyfriend. The whole story of their crazy affair, where they repeatedly mark each other with their cum and saliva.